| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun pl] over a period [prep] | 17 |
|
| 2 | [prep] [noun pl] over a period [prep] | 17 |
|
| 3 | [prep] [noun pl] over a period [prep] | 17 |
|
| 4 | [prep] [noun pl] over a period [prep] | 17 |
|
| 5 | [prep] [noun pl] over a period of | 16 |
|
| 6 | [prep] [noun pl] over a period of | 16 |
|
| 7 | of [noun pl] over a period [prep] | 8 |
|
| 8 | of [noun pl] over a period [prep] | 8 |
|
